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TPS3895ADRYR Datasheet(PDF) 6 Page - Texas Instruments |
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TPS3895ADRYR Datasheet(HTML) 6 Page - Texas Instruments |
6 / 21 page ENABLE GND SENSE VCC CT SENSE_OUT 1 2 3 6 5 4 ENABLE GND SENSE VCC CT SENSE_OUT 1 2 3 6 5 4 TPS3895, TPS3896 TPS3897, TPS3898 SBVS172A – JULY 2011 – REVISED SEPTEMBER 2011 www.ti.com PIN CONFIGURATIONS DRY PACKAGE: TPS3895, TPS3897 DRY PACKAGE: TPS3896, TPS3898 USON-6 USON-6 (TOP VIEW) (TOP VIEW) PIN ASSIGNMENTS TPS3895/ TPS3896/ PIN NAME TPS3897 TPS3898 DESCRIPTION Capacitor-adjustable delay. The CT pin offers a user-adjustable delay time. Connecting this pin to a ground referenced capacitor sets the delay time for SENSE rising above 0.5 V to CT 5 5 SENSE_OUT asserting (or ENABLE asserting to SENSE_OUT asserting for A version devices). tpd(r) (s) = (CCT (µF) × 4) + 40 µs Active high input. Driving ENABLE low immediately makes SENSE_OUT go low, independent of V(SENSE). With V(SENSE) already above VIT+, drive ENABLE high to make ENABLE 1 — SENSE_OUT go high after the capacitor-adjustable delay time (A version) or 0.2 µs (P version). Active low input. Driving ENABLE high immediately makes SENSE_OUT go high, independent of V(SENSE). With V(SENSE) already above VIT+, drive ENABLE low to make ENABLE — 1 SENSE_OUT go low after the capacitor-adjustable delay time (A version) or 0.2 µs (P version). GND 2 2 Ground This pin is connected to the voltage that is monitored with the use of external resistor. The output asserts after the capacitor-adjustable delay time when V(SENSE) rises above 0.5 V and SENSE 3 3 ENABLE is asserted. The output de-asserts after a minimal propagation delay (16 µs) when V(SENSE) falls below VIT+ – Vhys. SENSE_OUT is an open-drain/push-pull output that is immediately driven low after V(SENSE) falls below VIT+ – Vhys or the ENABLE input is low. SENSE_OUT goes high after the SENSE_OUT 4 — capacitor-adjustable delay time when V(SENSE) is greater than VIT+ and the ENABLE pin is high. Open-drain devices(TPS3897/8) can be pulled up to 18 V independent of VCC; pull-up resistors are required for these devices. SENSE_OUT is an open-drain/push-pull output that is immediately driven high after V(SENSE) falls below VIT+ – Vhys or the ENABLE input is high. SENSE_OUT goes low after the SENSE_OUT — 4 capacitor-adjustable delay time when V(SENSE) is greater than VIT+ and the ENABLE pin is low. Open-drain devices(TPS3897/8) can be pulled up to 18 V independent of VCC; pull-up resistors are required for these devices. Supply voltage input. Connect a 1.7-V to 6.5-V supply to VCC to power the device. It is good VCC 6 6 analog design practice to place a 0.1- µF ceramic capacitor close to this pin. 6 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TPS3895 TPS3896 TPS3897 TPS3898 |
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